================
@@ -3126,3 +3137,57 @@ CodeGenFunction::EmitPointerAuthAuth(const
CGPointerAuthInfo &PointerAuth,
return EmitPointerAuthCommon(*this, PointerAuth, Pointer,
llvm::Intrinsic::ptrauth_auth);
}
+
+llvm::Value *CodeGenFunction::EmitPointerAuthSign(QualType pointeeType,
+ llvm::Value *pointer) {
+ CGPointerAuthInfo pointerAuth =
+ CGM.getPointerAuthInfoForPointeeType(pointeeType);
+ return EmitPointerAuthSign(pointerAuth, pointer);
+}
+
+llvm::Value *CodeGenFunction::EmitPointerAuthAuth(QualType pointeeType,
+ llvm::Value *pointer) {
+ CGPointerAuthInfo pointerAuth =
+ CGM.getPointerAuthInfoForPointeeType(pointeeType);
+ return EmitPointerAuthAuth(pointerAuth, pointer);
+}
+
+llvm::Value *
+CodeGenFunction::EmitPointerAuthResignCall(llvm::Value *value,
+ const CGPointerAuthInfo &curAuth,
+ const CGPointerAuthInfo &newAuth) {
+ assert(curAuth && newAuth);
+
+ if (curAuth.getAuthenticationMode() !=
+ PointerAuthenticationMode::SignAndAuth ||
+ newAuth.getAuthenticationMode() !=
+ PointerAuthenticationMode::SignAndAuth) {
+ auto authedValue = EmitPointerAuthAuth(curAuth, value);
+ return EmitPointerAuthSign(newAuth, authedValue);
+ }
+ // Convert the pointer to intptr_t before signing it.
+ auto origType = value->getType();
+ value = Builder.CreatePtrToInt(value, IntPtrTy);
+
+ auto curKey = Builder.getInt32(curAuth.getKey());
+ auto newKey = Builder.getInt32(newAuth.getKey());
+
+ llvm::Value *curDiscriminator = curAuth.getDiscriminator();
+ if (!curDiscriminator)
+ curDiscriminator = Builder.getSize(0);
+
+ llvm::Value *newDiscriminator = newAuth.getDiscriminator();
+ if (!newDiscriminator)
----------------
kovdan01 wrote:
Nit: it looks like that it's a pretty common practice to check returned value
of `.getDiscriminator()` against nullptr and then assign discriminator to zero
constant of size type if the check succeeds. Probably it's worth adding a
corresponding file-local helper or member function.
Feel free to ignore.
https://github.com/llvm/llvm-project/pull/98847
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